新闻阅读器，responseXML为空,该如何解决
日期：2014-05-16 浏览次数：20711 次
新闻阅读器，responseXML为空
照着书上打得，老是出错，http.responseXML is null,请各路英雄帮忙看看问题出哪
照着书上打得，老是出错，http.responseXML is null,请各路英雄帮忙看看问题出哪
<html>
<head>
<script language="javascript" src="rssd.js">
</script>
</head>
<style type="text/css">
.title{
font:16px bold helvetica,arial,sans-serif;
padding:0px 30px 0px 30px;
text-decoration:underline;
}
</style>
<body>
<h3>An Ajax RSS Reader</h3>
<form name="form1">
URL of Rss feed:<input type="text" name="feed" size="50" value="http://">
<input type="button" value="Get Feed" onclick="getRSS()"><br>
<div id="news"><h4>Feed Titles</h4></div>
</form>
</body>
</html>
function getXMLHTTPRequest(){
var request=false;
try{
request=new XMLHttpRequest();
}
catch(err1)
{
try{
request=new ActiveXObject("Msxml2.XMLHTTP");
}
catch(err2)
{
try{
request=new ActiveXObject("Microsoft.XMLHTTP");
}
catch(err3)
{
request=false;
}
}
}
return request;
}
var http=getXMLHTTPRequest();
function getRSS(){
var myurl='rssproxy.php?feed=';
var myfeed=document.form1.feed.value;
myRand=parseInt(Math.random()*999999999);
var modurl=myurl+escape(myfeed)+"&rand="+myRand;
http.open("GET",modurl,true);
http.onreadystatechange=useHttpResponse;
http.send(null);
}
function useHttpResponse(){
if(http.readyState==4){
if(http.status==200){
/* alert("The server said:"+http.responseText);
}else{
alert("An error has occurred:"+http.statusText);
}
}
}*/
while(document.getElementById('news').hasChildNodes())
{
document.getElementById('news').removeChild(document.getElementById('news').firstChild);
}
var titleNodes=http.responseXML.getElementsByTagName("title");
var descriptionNodes=http.responseXML.getElementsByTagName("description");
var linkNodes=http.responseXML.getElementsByTagName("link");
for(var i=1;i<titleNodes.length;i++)
{
var newtext=document.createTextNode(titleNodes[i].childNodes[0].nodeValue);
var newpara=document.createElement('p');
var para=document.getElementById('news').appendChild(newpara);
newpara.appendChild(newtext);
newpara.className="title";
var newtext2=document.createTextNode(descriptionNodes[i].childNodes[0].nodeValue);
var newpara2=document.createElement('p');
var para2=document.getElementById('news').appendChild(newpara2);
newpara2.appendChild(newtext2);
newpara2.className="descrip";
var newtext3=document.createTextNode(linkNodes[i].childNodes[0].nodeValue);
var newpara3=document.createElement('p');
var para3=docuement.getElementById('news').appendChild(newpara3);
newpara3.appendChild(newtext3);
newpara3.className="link";
}
}
}
}<?php
$mysession=curl_init($_GET['feed']);
curl_setopt($mysession,CURLOPT_HEADER,false);
curl_setopt($mysession,CURLOPT_RETURNTRANSFER,true);
$out=curl_exec($mysession)
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